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DS33M31N Datasheet(PDF) 7 Page - Maxim Integrated Products |
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DS33M31N Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 20 page ___________________________________________________ DS33M30/M31/M33 ABRIDGED DATA SHEET Rev: 101508 7 of 20 1.3 SONET/SDH 1.3.1 STS-3/STM-1 SerDes • SerDes with clock recovery at 155.52Mbps interface for STS-3/STM-1 data stream • LVDS/LVPECL levels for glueless interconnect to 155.52Mbps optical transceiver device 1.3.2 STS-3/STM-1 Framer and Formatter 1.3.2.1 STS-3/STM-1 Formatter with Transport Overhead Insertion • User-configurable scrambling for transmit STS-3/STM-1 bit stream • User-configurable TOH bytes insertion for framing (A1, A2), Section trace (J0), Section BIP-8 (B1), Section orderwire (E1), Section user channel (F1), Section Data Communication Channel (DCC) (D1-D3), STS-1 pointers (H1, H2, H3), Line BIP-8 (B2), automatic protection switching (APS) channel (K1, K2), Line DCC (D4-D12), synchronization status message (S1), line Remote Error Indication (REI) (M1), and line orderwire (E2). Note: B1 and B2 are configured as error masks • Automatic calculation and insertion of Section BIP-8 (B1) and Line BIP-8 (B2) • User configurable insertion of AIS-P, and AIS-L • Programmable generation of H1, H2, and H3 bytes as an error mask • All TOH bytes can be inserted from the associated transmit STS-3 transport overhead input port or software accessible internal registers • Automatic or manual generation of line remote error indication (REI-L) and line remote defect indication (RDI-L) • Programmable insertion of framing errors, B1 errors, B2 errors, and invalid pointer • Insertion of HDLC data stream into section DCC (D1-D3), line DCC (D4-D12), TOH DCC (D1-D12), or section user channel (F1) • Insertion of trace ID message into section trace (J0) 1.3.2.2 STS-3/STM-1 Framer with Transport Overhead Extraction • Frame synchronization for STS-3 compliant to GR-253 so that SEF defect is not detected more than an average of once every six minutes in the presence of STS-1 BER of 10-3 • Optional descrambler of incoming STS-1 data stream with polynomial of 1+x6+x7 • Extraction of all TOH bytes (per LTE requirement): Framing (A1, A2), Section trace (J0), Section BIP-8 (B1), Section orderwire (E1), Section user channel (F1), Section Data Communication Channel (DCC) (D1- D3), STS-1 pointers (H1, H2, H3), Line BIP-8 (B2), automatic protection switching (APS) channel (K1, K2), Line DCC (D4-D12), synchronization status message (S1), Line Remote Error Indication (REI) (M1), and Line orderwire (E2) • All TOH bytes are presented on the associated receive STS-3 transport overhead output port and software accessible internal registers • Detection of STE and LTE defects including LOS, LOF, SEF, COFA, and AIS-L • Fully programmable automatic downstream path AIS (AIS-P) insertion upon detection of LOS, LOF, TIM-S, and/or AIS-L • Detection of STE and LTE defects including RDI-L, APS unstable, and sync message change (S1) • Detection and accumulation of framing errors (A1/A2), OOF occurrences, section BIP-8 (B1) errors (bit or block basis), line BIP-8 (B2) errors (bit or block basis), and line remote error indications (REI-L) • Extraction of HDLC data stream from Section DCC (D1-D3), Line DCC (D4-D12), TOH DCC (D1-D12), or Section user channel (F1) • Extraction of trace ID message from Section trace (J0) • Two line BIP-8 parity (B2) bit error rate (BER) measurement circuits with separate software programmable detection and clearing settings |
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